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Have you bought all parts needed for this project yet? And do you think you could manage to work on this project alone? Because to be honest, due to what happened with Microcat I probably won't get my hopes up on this project until you have purchased all the parts (in case you run out of money once again) and showed us that you can continue working on this even if all other teamates stop doing anything (this is why I never work on team projects). But if it succeeds then I will be happy because that would be a nice thing to mess around with, plus it has a Z80 in it.
That's good, then. And for the Microcat prototype, couldn't you just have re-used the parts you already had? Or were they exclusively made for use on a breadboard?As for the Z80 I wouldn't say the project is 100% pure Z80 since another CPU does a lot of work for display and stuff, but if it's still Z80 enough to be programmed like the ZX Spectrum and Z80 calcs, then I always wondered if it could run KnightOS or some sort of firmware that could run old calculator programs? Not that it's the priority right now, but that was something I was wondering.
It probably depends if KOS mostly use the Z80 instructions set, right? Wouldn't Z80 ASM on the ZPX-128 be mostly different when it comes to drawing stuff to the screen? (Since it seems like video stuff is done by a different processor)The biggest issue with KOS from what I heard would be copyrights, because I heard (and saw) that the author is very strict about re-use of his intellectual property (per open-source standards, at least) and you have to make sure he is credited properly. Make sure to read the license thoroughly before releasing new versions or ports of KnightOS, let alone selling hardware on which it runs.
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